Furnace.



No. 692,439. Pa'tentedfeb. 4, I902.

' J. G. GEIGES.

F U B N A O E'.

(Applicgtion filed July 22, 1901.

(No Model.)

WiTnesses (5 mm X ATENT FFICE;

JOSEPH G. GEIGES, OF CINCINNATI, OHIO.

FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 692,439, dated February 4, 1902.

Application filed July 22,1901.

T0 [LZZ wit/0772, it may concern:

Be it known that I, JosEPH G. GEIGES, a citizen of the United States of America, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Furnaces,of which the following is a specification.

The object of my invention is a means for producing more perfect combustion in the furnace by taking in the outside air, heating it thoroughly, and mixing it with the gases in the furnace, said means being simple in construction and leaving the interior of the furnace unobstructed. The object is attained by the means described in the annexed specification and illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal central sectional View of a furnace embodying my invention, the bottom only of the boiler being shown. Fig. 2 is a sectional plan view of the same, taken upon line 00 a'of Fig. 1. Fig. 3 is a detail vertical transverse sectional view showing but one of the side walls of the furnace.

Referring to the parts, furnace A, boiler A, grate-bars a, and bridge-wall a are of ordinary construction, and hence need not be described in detail. Adjacent to the rear of bridge-wall a and upon a level with its top I place a horizontal pipe 13, whose open end 12 extends to the outside air. Tapped into pipe B and running thence parallel to the gratebars are pipes O O with their inner faces a c plumb with the inner faces of the side walls of the furnace and each of a diameter less than that of pipe B. Inner faces 0 are made preferably flat, so that when in position they form part of the inner faces of the furnace, as shown in Fig. 3. Pipes 0 C have rear- Wardly-directed horizontal perforations c c in their faces 0. In open end I) of pipe 13, I place a steam-injector D.

In putting my attachment in place it is seen that the only change it is necessary to make in an ordinary furnace is to put pipes O O in place of one course of bricks, as shown in Fig. 3, and make passages in the side walls for pipe B. It is seen, likewise, that the interior of the furnace is not in the least obstructed.

In use the outside air is carried into pipe B by injector D, thence into pipes C O, issuing thence through perforations in a horizontal Serial No. 69,184. (No model.)

plane and in a direction toward the bridgewall, assisting the draft upward through the grate-bars and at the same time thoroughly mixing the gases with oxygen. The proximity ofpipe B to the bridge-wall and of pipes O O to the interior of the furnace causes them all to become highly heated, so that the air passing through is raised to a high temperature before going into the furnace, so that there being a plentiful supply of oxygen and that at a high temperature a more complete combustion is had within the furnace.

WVhat I claim is- 1. In a furnace the combination of a horizontal pipe adjacent to the bridge-wall and having an open. end extending outside of the furnace-walls, pipes in the side walls of the furnace above the grate-bars with their inner faces directly exposed to the heat of the furnace, having perforations leadinginto the furnace and being tapped into said horizontal pipe, and a steam-injector leading into the open end of said horizontal pipe, substantially as shown and described.

' 2. In a furnace the combination of a transverse pipe placed immediately in the rear of the bridge-wall and having an open end extending through one of the side walls of the furnace, a longitudinal pipe connected to said transverse pipe and placed in each side wall of the furnace above the grate-bars with its face exposed to and having rearwardly-directed perforations forming communication with the interior of the furnace and a steam injector leading into the open end of the transverse pipe, substantially as shown and described.

3. In a furnace the combination of a transverse pipe adjacent to the bridge-wall and having an open end extending through one side wall of the furnace, two longitudinal pipes tapped into the transverse pipe having the inner side flattened situated in the side walls of the furnace with the flattened sides flush with said side walls and having rear wardly-directed perforations in said flattened sides and a steam-injector leading into the open end of the transverse pipe, substantially as shown and described.- I

JOSEPH G. GEIGES. Witnesses:

W. F. MURRAY, EMMA LYFORD.

Icd 

